Attractive features in book to be without plot problems? (5,5)

I believe the answer is:

black holes

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'attractive features' is the definition.
Although both the answer and definition are plural nouns, I can't see how one could define the other.

'book to be without plot problems?' is the wordplay.
'book' becomes 'b'.
'to be without' becomes 'lack' (I've seen this before).
'plot problems?' becomes 'holes' (I can't explain this - if you can you should give a lot more credence to this answer).
'b'+'lack'+'holes'='BLACK HOLES'

'in' acts as a link.

Can you help me to learn more?

I've seen this clue in The Independent.

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